竹节草对铝胁迫响应及临界浓度筛选

Response and critical concentration selection of Chrysopogon aciculatus response to aluminum stress

用水培法,采用叶片颜色、坪用质量和叶片枯黄率3种评价指标对不同铝浓度处理下的竹节草(Chrysopogon aciculatus)进行初步评价和竹节草铝胁迫下的临界浓度筛选。结果显示,3个评价指标在不同处理浓度之间存在显著差异(P【0.05),随着铝浓度(0~2.7 mmol·L-1)的提高,叶片枯黄率呈上升趋势,叶片颜色和坪用质量则呈下降趋势。以叶片枯黄率50%作为确定竹节草存活的临界铝浓度,建立回归方程,可得竹节草具有50%存活的临界铝浓度为1.909 6 mmol·L-1。

Aluminum tolerance of Chrysopogon aciculatus had been evaluated in different aluminum concentrations by leaf color,turf quality and leaf firing percentage to screen critical aluminum concentration with water culture method. The result showed that there were significant( P < 0. 05) differences between different treatments of aluminum concentrations. With the increase of aluminum concentration( 0 ~ 2. 7 mmol·L- 1),the leaf firing percentage increased,while the scores of leaf color and turf quality decreased. Fifty percentage of leaf firing percentage can be survival index according to regression equation and the lethal aluminum concentration of C. aciculatus was 1. 909 6mmol·L- 1.